SEOUL, Sept. 30 (Yonhap) -- North Korea made public a photo of leader Kim Jong-il's third son and heir apparent, Kim Jong-un, for the first time Thursday, a day after elevating him to powerful posts in his first official titles.The undated photo, released by North Korea's official Korean Central News Agency on Sept. 30, shows North Korean leader Kim Jong-il (R) and his the third son and heir apparent, Kim Jong-un (2nd from L), posing for a photo along with participants in this week's convention of the ruling Workers' Party, the country's biggest political event in decades. (KCNA-Yonhap)

The photo, released by the North's official Korean Central News Agency, showed the chubby son posing for a camera along with leader Kim and participants in this week's national convention of the ruling Workers' Party, the country's biggest political event in decades.

It marked the first released photo of a grown-up Kim Jong-un, believed to be in his late 20s.